# Do stairs need a landing

## Baunetz_Knowledge

Depending on the type of staircase, a distinction is made between the following types of platforms:

• Central platforms between two runs one behind the other
• Reversible landings for two-way stairs running in opposite directions
• Corner or quarter platforms with changes of direction by 90 °

Two methods are available for determining the depth of the landing:

1. According to the Model Building Regulations (MBO), the length and depth of the platform should at least correspond to the usable running width (depending on the type of building).
2. The platform depth should at least correspond to the respective step size of the stairs plus a step width. In the case of a staircase with a gradient of 17/29 cm, the platform length would therefore be 92 cm.

The DIN 18065 additionally specifies the following minimum dimensions for platforms for necessary stairs:

• Residential buildings with up to two apartments: 80 cm or 2.5 steps (2.5 x a) of the smallest step of the flight of stairs
• other buildings: 100 cm or 3 steps (3 x a) of the flight of stairs

In the case of spiral and circular stairs, the required length of the landing is measured on the running line. For doors that open in the direction of the stairs, it should be noted that the platform must be at least as deep as the door is wide.

Depending on the direction of movement or deflection on the pedestal, the following geometric pedestal shapes result in the plan:

• Squares or rectangles
• Quarter circle segments
• Semicircular segments
• Trapezoids or trapezoids
• Ring segments
The support of the landing in the stair wall and the connection of the flights of stairs to the landing play an important role for sound insulation in the building, especially with concrete stairs. In principle, there are two different options for decoupling the staircase in terms of impact noise: Either the landing and the staircase form a single, longitudinally stretched component that is decoupled from the wall at the supports. Or the platform spans transversely between the side walls and is provided with a floating screed, while the run is connected to the platform by decoupled supports.

### Expertise on the subject

Planning basics

Space requirement

The number of steps and run length and thus the space required for a stair result from the choice of the gradient ratio ...

Stair shapes

Multi-flight stairs

According to its name, the multi-flight staircase consists of several straight or spiral flights that are separated by platforms.